Jacketed suction mold



Allg- 6, 1935. R. w. CANFIELD JACKETED SUCTION MOLD Filed July 14, 1932 MHESS:

Patented Aug. 6, 1935 UNITED STATES PATENT OFFICE aoioau JACKETED s'Uc'rIoN MOLD Application July 14, 1932, Serial P10/622,410

9 Claims.

This invention relates to molds for gathering glass from the surface of a gathering pool by suction, and has particular relation to suction molds provided with jackets `for cooling purposes.

When a suction mold is moved toward and away from the surface of a gathering pool to gather a charge for a blank or parison, it is of course subjected to intense heat, which is radiated from the glass. In order to prevent the molds from attaining too high a temperature in this way, it has been proposed to cool them by means of a cooling air jacket or 'by directing a stream of cool air against them.

But a suction mold also is locally heated on its bottom end as a result of being dipped into the glass. This heating is apt to cause a diierential temperature condition in the blank or parison, resulting in improper distribution of the glass when the blank or parison is blown to iinal form in a finishing mold, and none of the arrangements heretofore provided for cooling molds is adequate to counteract such localized heating of a suction mold.

I'he general object of this invention is to provide novel means for cooling a suction mold which is adapted to counteract the localized heating of the bottom end of the mold in order to insure the formation of a blank of more uniform temperature throughout its length.

A more specific object of the invention is to provide a suction mold unit in which the mold holder is formed into a cooling jacket arranged to insure that the bottom end of the mold will be cooled to the desired extent and thus maintained at the best temperature for producing blanks or parisons of uniform temperature characteristics. This cooling jacket also may serve to cool the upper portion of the mold, as is more or less usual in practice.

In order to understand more fully the invention, reference should be had to the accompanying drawing inwhich:

Figure 1 is a view in vertical transverse section of a mold unit embodying the invention and 45 taken substantially on the line I-I of Fig. 3;

Fig. 2 is a view in side elevation of the mold unitinFig. 1; and

Fig. 3 is a horizontal top plan view of the mold unit of Fig. 1 and taken substantially on the line 50 3-3 of Fig. 1.

A suction mold unit embodying the invention may include a suction head shown partially at 5,

a neck pin 5, a sectional neck ring or mold 'I,

a sectional Aparison body mold 8, and holders 9 for the sections of the body mold.

It will be understood that the sections of the body mold are substantially identical in construction, as also are the holders, and that the holders are adapted to be mounted on a vertical hinge pin by hubs, one of which hubs is seen at III.

Each holder 9 is made hollow and provided with fluid inlet and outlet pipes I I and I2 for the circulation of a cooling medium such as water through the holder to cool the mold. The cooling medium may enter through pipe I I, which empties l0 y it into' a chamber I3. From chamber I3, the cooling medium passes in contact with the cylindrical portion I4 of the holder, thence downwardly and underneath a web or baille I5. The baille I5. divides the interior of the holder into two chamu bers and forces the cooling medium into a bottom passage or channel I6 in flange Il projecting in-g wardly of the holder.

The mold section is undercut to receive ange Il which directly contacts with the cylindrical 20 bottom portion I8 of the mold section which it encircles, the ange in effect forming a continuation of the mold bottom.

After passing beneath web I 5 and through channel I6, the cooling medium rises through the annular passage I9 in contact with the cylindrical wall 20 of the holder, and finally is exhausted through pipe I2. y

It will be understood of course that the direction of circulation as above described, and as shown by the arrows in the drawing, may be reversed. Y

Near its upper end, web I5 widens to provide a tube 2i through which extends stud 22 which holds the mold section in its holder and in direct contact therewith at I8, as already stated, and at 23 where a shoulder is provided to receive the inner top portion of the holder.

Beneath shoulder 23 there preferably is formed an annular pocket 24 which turns in at its bottom 40 above flange I'I, as shown at 25. This pocket tends to minimize to some extent the conduction of heat from the major and upper portion of the mold and to equalize such conduction, whereas the conduction of heat from the bottom portion I8 45 of the mold, where flange I1 directly engages it, is unrestricted. In this manner, the bottom part of the mold which is subjected to the most intense heat is accordingly cooled the most without unduly cooling the remaining part of the 60 mold. At the same time, the entire mold is protected from the heat radiated from the gathering pool by the jacket-holders which encircle it.

If desired, the pocket 24--25 may be omitted or modied and/or other changes made in the design 2 or proportions oi parts to vary the coo ci the mold according to the requirements of practice.

A construction embodying my invention oders the advantages of simplicity and low cost of manufacture, because of the act that the cooling jacket is formed in the holders rather than in additional structure or in the mold proper. It would be much more expensive, if not impracticable, to provide a cooling jacket in the mold. It is to be understood that the expressions suction mold unit", suction body mold, suction receptacle, are intended to mean only a unit mold or receptacle which is adapted to be charged from the surface ofthe pool of glass by suction.

Having thus described my invention, what l desire to claim and secure by LetteraPatent is:

l. A suction mold unit comprising a; sectional body mold, and holders removably supporting the mold, said holders being arranged to provide a two-part cooling-jacket separate from but surrounding the bottom end portion of the mold to indirectly cool said bottom portion.

2. A suction mold unit comprising a vertically divided suction body mold and holders for removably supporting the mold, said holders constituting a cooling jacket separate from but substantially encircling the bottom end portion of the mold, and also substantially encircling a major portion of` the mold above said bottom portion and said jacket being in heat exchanging relation with the mold.

ii.C A suction mold unit comprising a vertically divided suction body mold having a bottom portion of reduced diameter, and holders for removably supporting the mold constituting a cooling jacket .independent of but surrounding the reduced portion of said mold in-heat exchanging relation thereto.

4. A suction mold'unit comprising a vertically divided suction body mold, and holders for removably supporting the mold providing an imperiorate cooling jacket for the bottom end portion of the mold, and for a major portion of the mold above the body portion, said holders and mold being located in heat exchanging relation but slightly spaced apart, substantially throughout said major portion.

5. A suction mold unit comprising a vertically divided suction body mold, and holders for removably supporting the mold constituting an imperiorate cooling jacket directly engaging the bottom end portion of said mold, and surrounding but being spaced from a major portion of said mold above said end portion.

6. A suction mold unit comprising a vertically divided suction body mold having a reduced bottom end portion, and holders for removably supchioma porting the mold, said holders being formed as an imperforate cooling jacket separated from the mold-a portion of which jacket entends inwardly to engage and cool the reduced bottom end portion of said mold.

'7. A suction mold unit comprising a suction receptacle vertically divided into sections, holders adapted to receive and embrace the sections respectively, means for removably connecting'the sections to the holders, said holders being made hollow at least in the bottom portions thereof, for the passage of a cooling medium therethrough, and said bottom portions of the holders being shaped and arranged to surround the lowermost side portions of said sections and to contact with said sections to cool the bottoms of the mold sections which dip in the glass by the conduction of heat through the lowermost side portions thereof, -and into and through the bottom portions of said holders.

8. A suction mold unit comprising a vsuction receptacle vertically divided into sections, holders for the sections respectively,'means for removably securing the sections in the holders, said sections having narrow shoulders on the upper portions thereof for engagement with the holders and being reduced in size for a substantial part of their length to provide slight spaces between the sections and holders, the said sections being undercut to form a bottom portion on the receptacle of materially reduced cross section, the holders for the respective sections being hollow :duid tight castings each being provided with iluid inlet and exhaust pipes and constituting cooling chambers around the said spaces between the sections and holders, each holder having a hollow inturned flange which receives the undercut portion of its respective section and contacts with the lowermost side portion o said section for the removal of heat therefrom by conduction, and each holder having a `baie formed in the interior thereof for directing a cooling medium into the bottom part of the holder as said medium circulates through the holder.

9. A suction mold unit comprising a suction receptacle vertically divided into sections, holders for the sections respectively, each holder having a hollow inturned ange engaging the lowermost side portion of its respective section, which ange is adapted to contain a cooling medium for cooling the bottom portion of said section adjoining the bottom surface of the mold, and thus to counteract the heating of the bottom surface of the mold and of the glass gathered thereby, by the glass into which the mold is dipped.

ROBERT W. t 

